材料科学技术(英文版)2022，Vol.115Issue(20) ：10-18.

Deformation micro-twinning arising at high temperatures in a Ni-Co-based superalloy

Zijian Zhou Rui Zhang Chuanyong Cui Yizhou Zhou Xiaofeng Sun Jinglong Qu Yu Gu Jinhui Du Yi Tan
材料科学技术(英文版)2022，Vol.115Issue(20) ：10-18.
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Deformation micro-twinning arising at high temperatures in a Ni-Co-based superalloy

Zijian Zhou 1Rui Zhang 2Chuanyong Cui 2Yizhou Zhou 2Xiaofeng Sun 2Jinglong Qu 3Yu Gu 3Jinhui Du 3Yi Tan4
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作者信息

  • 1. Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China
  • 2. Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
  • 3. High Temperature Materials Research Division,Central Iron & Steel Research Institute,Beijing 100081,China;Beijing CISRI-Gaona Materials Technology Co.,Ltd.,Beijing 100081,China
  • 4. Key Laboratory of Materials Modification by Laser,Ion,and Electron Beams(Ministry of Education),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China
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Abstract

Deformation twinning is an important deformation mechanism in nickel-based superalloys.For super-alloys,deformation twins are generally observed at low or intermediate temperatures and high strain rates;however,the appearance of microtwins(MTs)at high temperatures has rarely been reported.In this study,transmission electron microscopy(TEM)was used to study MT formation in Ni-Co-based su-peralloys following compression at 1120℃/1 s-1.The deformation behavior was discussed in detail to reveal the mechanism of MT formation.The twinning mechanism at elevated temperatures was theoret-ically attributed to the low stacking fault energy(SFE)and poor dislocation-driven deformations caused by the high strain rate in specific directions.

Key words

Deformation twinning/Ni-Co-based superalloy/High temperatures/Loading direction/Stacking fault energy

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基金项目

National Key Research and Development Program of China(2019YFA0705300)

National Key Research and Development Program of China(2017YFA0700703)

National Science and Technology Major Project of China(2019-VI-0006-0120)

IMR Innovation Fund(2021-PY09)

Doctoral Start-up Foundation of Liaoning Province(2020-BS-007)

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量56
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